X being a privately owned company is like someone’s living room. That person may be very tolerant and let you say a lot of things, but if you push it too much, you will be asked to leave.
NOSTR is an open field. It may be half empty and ignored right now, but anything goes. nostr:note1dm8pha4795wjm8shp9rz0wdc5w7k5mq4rmqy7nsxyvrf6myhx3tqphjarl